nodejs/doc/api/readline.markdown

Readline

This module allows reading of a stream (such as STDIN) on a line-by-line basis.

Note that once you've invoked this module, your node program will not terminate until you've closed the interface, and the STDIN stream. Here's how to allow your program to gracefully terminate:

var readline = require('readline');

var i = readline.createInterface(process.sdtin, process.stdout, null);
i.question("What do you think of node.js?", function(answer) {
  //TODO: Log the answer in a database
  console.log("Thank you for your valuable feedback.");
  i.close();                //These two lines together allow the program to
  process.stdin.destroy();  //terminate. Without them, it would run forever.
});

createInterface(input, output, completer)

Returns an interface object, which reads from input, and writes to output. TODO: I think "completer" is used for tab-completion, but not sure.

interface.setPrompt(prompt, length)

TODO

interface.prompt()

TODO: Appears to trigger showing the prompt.

interface.question(query, cb)

Displays the query to the user, and then calls the callback after the user has typed in their response.

Example usage:

interface.question("What is your favorite food?", function(answer) {
  console.log("Oh, so your favorite food is " + answer);
});

interface.close()

TODO

interface.pause()

TODO

interface.resume()

TODO

interface.write()

TODO